Active HDL and the Case of the Haunted Cursor

Active HDL is really starting to piss me off.  I can't understand some of t=
he things it does.  Now the cursor won't stay where I put it.  It keeps mov=
ing to the end of the simulation a few seconds after I let go of it, or EVE=
N IF I'M STILL HOLDING ONTO IT!!!

I can drag it around as much as I like.  It will snap to changes in a signa=
l, but at some point it will snap back to the end of the simulation time.  =
Oh!  It's not just the cursor, the view in the waveform window moves to inc=
lude the end of the simulation time as well.  So I can't zoom in on anythin=
g else.

Is Aldec just trying to mess with me because I'm using the FREE version???

I would say the simulation was still running, but the last message in the c=
onsole says, "# KERNEL: stopped at time: 4500 ms"=20

Any ideas?=20

There might be a way to use Modelsim for this.  Not sure if it requires a p=
aid for license.=20

--=20

  Rick C.

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On 12/09/2020 17:06, Rick C wrote:
> Active HDL is really starting to piss me off.  I can't understand some of the things it does.  Now the cursor won't stay where I put it.  It keeps moving to the end of the simulation a few seconds after I let go of it, or EVEN IF I'M STILL HOLDING ONTO IT!!!

Might be time to re-install it or clean your simulation directory and 
start from scratch. Not sure about Active-HDL but for Modelsim there is 
simple trick of deleting a registry entry which then gives you a clean 
Modelsim similar to what you get after installation (unless you messed 
with the installation files).

> 
> I can drag it around as much as I like.  It will snap to changes in a signal, but at some point it will snap back to the end of the simulation time.  Oh!  It's not just the cursor, the view in the waveform window moves to include the end of the simulation time as well.  So I can't zoom in on anything else.
> 
> Is Aldec just trying to mess with me because I'm using the FREE version???
> 
> I would say the simulation was still running, but the last message in the console says, "# KERNEL: stopped at time: 4500 ms"
> 
> Any ideas?
> 
> There might be a way to use Modelsim for this.  Not sure if it requires a paid for license.

If your design is not that large and you don't use any Lattice 
primitives(unless you have RTL source) than you can use the Free Intel 
Modelsim starter edition.

https://www.intel.co.uk/content/www/uk/en/software/programmable/quartus-prime/model-sim.html

Some things to watch out for, for some reason the starter edition is a 
really old version of Modelsim (no idea why Mentor is doing this as it 
works against them). The executable line limit is not that easy to 
determine as Intel primitive libraries are excluded but if you do hit 
the limit the simulation reduces to 1% of Modelsim PE speed which in 
effect means it stops working.

I have been using Modelsim since version 5.3 and there is very little I 
can't do with it. Just make sure you don't use Modelsim projects as it 
will start to work against you,

Good luck,
Hans
www.ht-lab.com